I used to put coffee filters in the bottom of my flower pots to keep the soil in, but I found they disintegrated too fast, so I now use some landscaping fabric and it holds up much better.
I don't like to see grass or weeds growing in the cracks of my sidewalk and I don't use chemicals in my yard. I found this weeding tool at Walmart for less than $4.00 and it pulls them out by their roots and if you use it after a rainfall it is even easier to get them out.
I keep pots of extra tools in different places around my gardens, so when I am just walking around and see something that needs to be dug or clipped, I can go to the nearest batch of tools without having to walk all the way back to the house or to the garden shed.
When I buy vitamins, there is a little package in the container that absorbs moisture. I always save these and put them in my seed packets in case any moisture is still on the seeds.